Hi lee, Wings may have some difficulty handling n-gons, when you export from MoI try setting the option for "Quads & Triangles" instead.

Also try unchecking the "Weld vertices along edges" which you can see if you expand the meshing options dialog by the arrow in the lower left corner.

It also might be a good idea to send the OBJ file to the Wings programmers so they could take a look at it and see what Wings does not like about it, with Wings crashing it seems likely to be a bug in Wings.

- Michael